Parts for your 2017 Subaru Exiga-Spark plugs

2017 Subaru Exiga spark plugs — purpose, service intervals, and care

Yes, spark plugs are relevant to the 2017 Subaru Exiga. The 2017 model (often arriving in Australia and New Zealand as the Exiga or Exiga Crossover 7) runs a petrol flat-four. Subaru factory service information for the FB-series petrol engines used in this model, along with major plug makers’ application catalogues for 2015–2018 Exiga/Crossover 7 listings, specify iridium spark plugs. So, the 2017 Subaru Exiga absolutely uses spark plugs as part of its ignition system.

Spark plugs ignite the air–fuel mix inside each cylinder, and that clean, consistent spark is what keeps the Exiga starting crisply, idling smoothly, pulling well up hills, and sipping fuel the way it should. Modern iridium plugs are long-life items, but when they’re worn or fouled the engine can feel a bit doughy, use more fuel, and throw misfire codes. Keeping the 2017 Subaru Exiga spark plugs in good nick helps protect the coils, catalytic converters, and the family’s quiet ride.

For most 2017 Exiga/Crossover 7 examples with the 2.5‑litre FB25 petrol engine, long‑life iridium spark plugs are typically due around 100,000 km under normal driving. Shorter intervals may apply with lots of short trips, heavy loads, or if the vehicle’s service history is unknown—as is common with fresh imports. It’s a smart move to inspect or replace the plugs during a major service if the odometer or paperwork leaves any doubt.

• Tell‑tale signs it’s time: rough idle, harder starts, higher fuel use, sluggish acceleration, or a check‑engine light for misfire.
• Service tips under the bonnet:
  • Use OEM‑equivalent iridium plugs with the correct heat range for the Exiga’s engine code.
  • Replace all plugs as a set and torque to spec, don’t over‑tighten.
  • Avoid anti‑seize on plated plug threads, Subaru torque values assume dry threads.
  • Inspect coil boots and seals for cracks or oil intrusion from rocker cover gaskets.
  • After fitment, confirm smooth idle and clear any stored misfire codes.

Done right, fresh plugs can sharpen throttle response, smooth things out, and keep fuel economy on track—perfect for school runs and weekend getaways alike.

Popular questions about 2017 Subaru Exiga spark plugs

How often should spark plugs be changed on a 2017 Subaru Exiga?
Most Exiga/Crossover 7 models with the FB25 use long‑life iridium plugs that are typically due at about 100,000 km in normal conditions. If the vehicle is a recent import with patchy records, or it does mostly short trips, have them inspected sooner and consider replacement as preventive maintenance.

What spark plug type and gap does the 2017 Exiga use?
Use OEM‑equivalent iridium plugs matched to the Exiga’s engine code. Iridium plugs are usually factory pre‑gapped, avoid re‑gapping unless the manufacturer explicitly allows it. The correct specification can be confirmed on the under‑bonnet label or in Subaru service literature for the FB‑series engine.

Can worn plugs damage coils or the catalytic converter?
They can. Misfires from tired plugs make ignition coils work harder and can send unburnt fuel into the exhaust, risking catalyst damage. Replacing worn plugs promptly helps protect coils and emissions gear and keeps the Exiga running sweet.